📍 Los Angeles County & SoCal
🔧 30+ Years Experience
🎥 4K HDR Reference Monitor Specialist
🏢 TEK Media Group
🇺🇸 WE WORK LOCALLY & NATIONWIDE 🇺🇸
Los Angeles • Southern California • Shipping Available Across the United States
📋 A NOTE FROM MY WORKBENCH: The Sony BVM-HX300 is a professional-grade 4K HDR reference monitor with Sony's proprietary dual-layer LCD technology. It contains sophisticated power supplies, complex video processing boards, and precision optical components. Repairs require specialized knowledge, test equipment, and factory documentation. Over my 30+ years in this field, I've developed specialized techniques for restoring these reference monitors safely and correctly. My email is
jt@tekmg.com for direct inquiries.
⚠️ CRITICAL WARNING – BVM-HX300 SPECIFIC: This monitor contains high-voltage power supplies and sensitive optical components. The dual-layer LCD panel is extremely delicate and expensive. Repairs should only be performed by qualified technicians with experience in Sony BVM systems. I follow Sony factory service procedures and use proper ESD precautions.
About the Sony BVM-HX300 & My Approach
The Sony BVM-HX300 is the legendary 30-inch 4K HDR reference master monitor, representing the absolute pinnacle of professional monitoring technology. Featuring Sony's proprietary dual-layer LCD technology, this monitor delivers 1,000,000:1 contrast ratio, 1000 nits peak brightness, and covers over 99% of DCI-P3 color gamut. It's the standard for HDR grading in major Hollywood post-production facilities. I've restored dozens of BVM-HX300 monitors and I treat each one with the meticulous care this reference monitor deserves. I use premium replacement components and follow Sony factory service procedures to ensure your monitor performs to original broadcast specifications.
✅ WHY TRUST TEK MEDIA GROUP WITH YOUR SONY BVM-HX300:
- 30+ Years of Professional Broadcast Monitor Restoration Experience
- Specialized Knowledge of Sony BVM-HX Series Monitor Systems
- Full Power Supply & Main Board Recap
- Dual-Layer LCD Panel Evaluation & Driver Service
- Precision HDR Calibration (PQ, HLG, SDR)
- 4K Input Board Service (12G-SDI, HDMI 2.0, DisplayPort)
- Backlight Driver & Local Dimming Service
- Firmware Updates & Control Board Service
- Every Monitor Gets My Personal Attention – No Assembly Line
- 90-Day Warranty on All Work
- Nationwide Service – Secure Shipping Available Across All 50 States
- Direct Email: jt@tekmg.com for quick responses
Complete Sony BVM-HX300 Restoration Services I Offer
🔍 Full Diagnostic & Evaluation Complete assessment, power supply check, panel evaluation, input testing, color accuracy measurement, HDR performance verification
⚡ Power Supply Rebuild Replace all electrolytic capacitors, check bridge rectifiers, test voltage regulators, verify all supply rails
🎛️ Main Board & Processing Recap Full recap of main board, video processing board, and control board electrolytics
🖥️ Dual-Layer LCD Panel Service Evaluate panel for uniformity issues, dead pixels, or color shift; check panel driver boards
💡 Backlight & Local Dimming Service Test LED backlight arrays, verify local dimming zones, replace failed backlight driver boards
🎨 Precision HDR Calibration Calibrate to PQ (ST.2084), HLG, or SDR standards using professional colorimeter and pattern generator
📡 Input Board Service Test and repair 12G-SDI, HDMI 2.0, and DisplayPort inputs; check signal detection and switching
🔧 Firmware & Control Service Update firmware to latest version, check OSD controls, verify remote control operation (RS-422/RS-232/GPI)
🏆 COMPLETE FULL RESTORATION All services above – your BVM-HX300 will perform to original reference specifications
💡 WHAT MY RESTORATION INCLUDES: Full electrolytic recap (power supply + main board) • Dual-layer LCD panel evaluation • Backlight & local dimming service • Precision HDR calibration (PQ/HLG/SDR) • Input board testing • Firmware update • 90-day warranty.
🔧 Professional Tips & Troubleshooting Techniques – From My Workbench
After 30+ years of repairing broadcast monitors, I've compiled these proven tips and techniques for the BVM-HX300. Feel free to email me at jt@tekmg.com with specific questions.
💡 TIP #1: No Power / Won't Turn On – My Step-by-Step Approach
- First, verify AC input voltage (100-240V) and check the IEC power cord – I've seen many "dead" monitors that just had a bad cord.
- Check the main fuse on the power supply board – if blown, there's likely a short in the primary section.
- Inspect the standby power supply – measure 5V standby rail. If missing, I check startup resistors and the PWM controller IC.
- Common failure: Primary-side electrolytic capacitors – I always replace these with 105°C low-ESR types.
- Check the main relay – if not engaging, I suspect either the power supply or a short on the main board.
- Test all voltage rails: +24V (panel driver), +12V (main board), +5V (logic), +3.3V (processing).
💡 TIP #2: Backlight / Local Dimming Issues
- The BVM-HX300 uses advanced local dimming with hundreds of LED zones. If you see uneven brightness or dark patches, the backlight driver board may have failed capacitors.
- First, replace all electrolytic capacitors on the backlight driver board – I've fixed many uneven backlight issues this way.
- If individual zones are stuck on or off, the LED driver ICs may have failed – I can replace these.
- Check the local dimming algorithm in the service menu – corrupted settings can cause backlight issues.
- If the entire backlight is dim, the LED power supply may be failing – recap the backlight power supply.
💡 TIP #3: Dual-Layer LCD Panel Uniformity Issues
- The dual-layer LCD panel is the heart of the BVM-HX300. If you see mura (unevenness) or color shifts, first check the panel driver board capacitors.
- Replace all electrolytic caps on the panel driver boards – they run hot and fail prematurely.
- If uniformity issues persist, the panel may need to be replaced – I can source genuine Sony replacement panels.
- Check the optical bonding between the two LCD layers – delamination is rare but possible in extreme conditions.
💡 TIP #4: Color Inaccuracy / HDR Calibration Drift
- The BVM-HX300 requires regular recalibration – I recommend every 12-18 months for critical grading work.
- I use a professional colorimeter (Klein K10-A or CR-250) with Calman or ColourSpace software – consumer tools aren't accurate enough for HDR.
- Access the service menu – I have the factory access codes and documentation.
- Calibrate using internal test patterns for PQ (ST.2084) and HLG transfer functions.
- If color drifts significantly, aging capacitors on the video processing board are often the culprit – I replace them as part of my restoration.
💡 TIP #5: No Signal / Input Not Detected – Systematic Diagnosis
- I always check input cables first – 12G-SDI and HDMI 2.0 cables fail more often than people realize.
- Test all inputs (12G-SDI 1-4, HDMI, DisplayPort) to isolate the problem to a specific input board.
- For 12G-SDI issues: The SDI equalizer and reclocker ICs are prone to static damage – I've replaced many.
- For HDMI issues: The HDMI 2.0 receiver IC often fails – I reflow solder joints first; if that doesn't work, I replace the IC.
- Check the main video processor IC for cold solder joints – I use a hot air station to reflow them carefully.
💡 TIP #6: Flickering / Intermittent Display
- First, I reseat all ribbon cables connecting the main board to the panel driver boards – this fixes many intermittent issues.
- Inspect the panel driver boards for cracked solder joints on the connector pins – I reflow them with a fine-tip iron.
- Measure the panel supply voltages – ripple indicates bad filter capacitors. I replace them immediately.
- I replace all electrolytic capacitors on the panel driver boards as a matter of course – they degrade from heat.
💡 TIP #7: Dead Pixels / Stuck Pixels – Honest Assessment
- I run a pixel-exercise pattern for several hours – this can sometimes unstick pixels.
- For dead pixels (black), there is no reliable repair – panel replacement is the only option. I'm honest with clients about this.
- Sony's specification allows for a small number of dead pixels (typically 3-5) before the panel is considered defective.
- If the monitor has many dead pixels, the dual-layer LCD panel is failing. I can source genuine Sony replacement panels.
💡 TIP #8: Overheating / Fan Noise
- The BVM-HX300 has multiple cooling fans – I clean them with compressed air as part of every restoration.
- If a fan is noisy, I replace it with an exact specification replacement – I keep these in stock.
- Check for blocked ventilation grilles – dust buildup is a major problem in broadcast facilities.
- Measure internal temperature using the service menu – excessive heat accelerates capacitor aging.
- Replace any bulging or leaking capacitors near the power supply – they generate excess heat.
💡 TIP #9: Remote Control / RS-422 / GPI Not Working
- Check RS-422/RS-232 cable wiring – I keep known-good test cables.
- Inspect the transceiver ICs (typically MAX3232 or similar) – I replace these frequently.
- For GPI issues, I check opto-isolators and pull-up resistors.
- Update firmware – corrupted firmware can cause control interface failures.
💡 TIP #10: My Capacitor Replacement Philosophy for BVM-HX300
- Common capacitor failures: Power supply primary caps (8-12 years), main board SMD electrolytics (8-10 years).
- I use only 105°C low-ESR capacitors from Panasonic, Nichicon, or United Chemi-Con. No exceptions.
- I replace all capacitors on the power supply board regardless of visual appearance – they age even if not bulging.
- I document capacitor polarity before removal with photos – incorrect polarity causes immediate failure.
- After recap, I verify all voltage rails and allow 60 minutes of burn-in before full calibration.
⚠️ IMPORTANT NOTE FROM MY WORKBENCH: The BVM-HX300 is a precision reference monitor. Always use proper ESD protection when handling circuit boards. Never touch the LCD panel surface – it is extremely delicate and expensive. For urgent inquiries, email me at
jt@tekmg.com.
🔍 Quick Troubleshooting Reference Chart – From My Service Logs
| Symptom | Most Likely Cause | My Fix / Solution |
|---|
| No power, no LED
| Blown fuse, dead power supply
| Replace fuse, recap power supply, check MOSFETs, test PWM controller
|
| LED on, but no display / black screen
| Main board fault, backlight failure, ribbon cable
| Check ribbon cables, test backlight voltage, reflow main processor, check panel enable signal
|
| Dim or uneven backlight
| Backlight driver caps failed, LED aging, local dimming issue
| Replace backlight driver capacitors, check LED driver ICs, recalibrate local dimming
|
| Color inaccurate / HDR calibration off
| Calibration drifted, bad caps on video board
| Perform full HDR calibration (PQ/HLG), replace video processing board caps
|
| No signal on specific input
| Input board failure, cable issue, signal format mismatch
| Replace SDI equalizer IC, reflow HDMI receiver, check input selector relays
|
| Horizontal or vertical lines on screen
| Panel driver board, ribbon cable, panel failure
| Reseat ribbon cables, inspect driver board, panel replacement if severe
|
| Monitor shuts off randomly
| Overheating, power supply instability, bad thermistor
| Clean fans, replace thermistors, recap power supply, check for shorts
|
| Dead pixels (individual)
| LCD panel defect
| Run pixel exercise patterns; if unsuccessful, panel replacement required
|
| Remote control not working
| RS-422 transceiver failed, bad cable, firmware corruption
| Replace transceiver IC, update firmware, check cable continuity
|
Deep Dive: My Sony BVM-HX300 Restoration Process
⚡ POWER SUPPLY (Critical for Stability)
- Main Filter Capacitors: Large snap-in electrolytics (100-220µF @ 400-450V) – I replace with 105°C, high-ripple types.
- Secondary Side Caps: All low-voltage electrolytics (10-2200µF) are replaced with low-ESR, 105°C rated types.
- PWM Controller IC: I test and replace if faulty – I keep these in stock.
- Power MOSFETs / Diodes: I test switching MOSFETs and rectifier diodes, replace if shorted or leaky.
- Standby Power Supply: I rebuild the 5V standby circuit completely – critical for proper startup.
🎛️ MAIN BOARD & VIDEO PROCESSING
COMPLETE BOARD SERVICE – MY PROCEDURE:
- Electrolytic Capacitors: All SMD and through-hole electrolytics on the main board are replaced with high-quality Japanese types.
- Video Processor IC: I inspect for cold solder joints under my microscope – reflow with hot air if needed.
- Memory ICs: I check firmware memory – corrupt firmware can cause boot failures. I can reprogram these.
- Clock Circuit: I verify crystal oscillators for proper frequency – replace if drifted.
🖥️ DUAL-LAYER LCD PANEL & DRIVER SERVICE
- Panel Driver Boards: I replace all electrolytic capacitors on the panel driver boards – they run hot and fail prematurely.
- Ribbon Cable Inspection: I clean and reseat all ribbon cables using DeoxIT contact cleaner.
- Panel Uniformity Check: I evaluate the dual-layer LCD for mura, color shift, and dead pixels.
- Optical Bonding Inspection: I check for delamination between the two LCD layers – rare but serious.
💡 BACKLIGHT & LOCAL DIMMING SERVICE
- Backlight Driver Boards: I recap all backlight driver boards – common failure point.
- LED Driver ICs: I test and replace failed LED driver ICs – I keep these in stock.
- Local Dimming Calibration: I verify local dimming zone operation and calibrate if needed.
- Backlight Power Supply: I test and recap the dedicated backlight power supply.
📡 INPUT BOARD SERVICE
- 12G-SDI Inputs: I test SDI equalizer and reclocker ICs – replace if signal loss is detected.
- HDMI 2.0 Input: I check HDMI receiver IC and ESD protection diodes – common failure due to hot-plugging.
- DisplayPort Input: I verify DisplayPort receiver IC and associated circuitry.
- Input Selection: I test input relays and multiplexers – replace if intermittent.
Sony BVM-HX300 – Component Overhaul Database
⚠️ Typical restoration: 60-80 electrolytic capacitors replaced across power supply, main board, and panel driver boards.
POWER SUPPLY BOARD
| Component | Original Type | My Restoration Replacement |
|---|
| Main Filter Capacitor
| 100-220µF @ 400-450V
| 105°C, High-ripple (Nichicon, United Chemi-Con)
|
| Secondary Side Caps
| 10-2200µF @ 16-35V
| Low ESR, 105°C (Panasonic FC / Nichicon PW)
|
| Standby Power Caps
| 1-47µF @ 50V
| Low ESR, 105°C, long life
|
MAIN BOARD & PROCESSING
| Section | Capacitor Count | My Replacement |
|---|
| Power Supply Decoupling
| 15-25 caps
| Low ESR, 105°C (Panasonic FC / Nichicon PW)
|
| Video Signal Path
| 8-12 caps
| High-grade audio/video path caps (Nichicon FG)
|
| Audio Section
| 6-10 caps
| Nichicon FG or Elna Silmic II
|
PANEL & BACKLIGHT BOARDS
| Component | Action | My Specification |
|---|
| Panel Driver Caps
| Replace All
| Low ESR, 105°C, 2000-5000 hour rated
|
| Backlight Driver Caps
| Replace All
| High ripple current, 105°C
|
| Ribbon Cable Connectors
| Clean & Reseat
| DeoxIT treatment
|
Precision HDR Calibration Procedure – As I Perform It
🎨 MY HDR CALIBRATION PROCESS FOR BVM-HX300:
- Warm-Up: I power on the monitor for a minimum of 90 minutes before any calibration measurements – HDR stability is critical.
- Colorimeter Used: I use a professional colorimeter (Klein K10-A or CR-250) with Calman or ColourSpace software – required for accurate HDR measurement.
- White Balance Calibration: I adjust for D65 (6500K) color temperature across the entire luminance range.
- PQ (ST.2084) Calibration: I calibrate the PQ EOTF curve from 0 to 1000 nits, targeting Delta E < 1.0.
- HLG Calibration: I calibrate HLG transfer function for broadcast HDR applications.
- Gamut Calibration: I verify and adjust Rec.709, DCI-P3, and BT.2020 color gamuts.
- Local Dimming Verification: I verify local dimming performance with specific test patterns.
- Verification: I provide a detailed calibration report showing all before/after measurements.
💡 NOTE: Proper HDR calibration requires professional equipment and software. I've invested in the best tools over my 30+ year career. Your BVM-HX300 will leave my bench calibrated to broadcast HDR standards.
Sony BVM-HX300 Specifications
| Parameter | Specification |
|---|
| Display Type
| Dual-Layer LCD with Local Dimming
|
| Screen Size
| 30 inches diagonal
|
| Resolution
.=4096 x 2160 (4K DCI)
|
.=Aspect Ratio
.=17:9 (native 4K DCI)
.=Peak Brightness
.=1000 nits (typical)
.=Contrast Ratio
.=1,000,000:1 (typical)
.=Color Gamut
.=>99% DCI-P3, >85% BT.2020
.=Inputs
.=12G-SDI (x4), HDMI 2.0, DisplayPort, RS-422/RS-232, GPI
.=Power Consumption
.=Approx 280W (max)
.=Weight
.=Approx 55 lbs (25 kg)
Nationwide Service – We Ship Across America
🇺🇸 WE SERVE CUSTOMERS IN ALL 50 STATES 🇺🇸
Ship your BVM-HX300 securely to my Los Angeles facility – I'll handle the rest
I've restored BVM-HX300 monitors for major studios and post-production facilities nationwide:
- Secure Packaging: I'll provide detailed packing instructions for your BVM-HX300 – double-boxing with high-density foam.
- Insured Shipping: I recommend fully insured shipping for your valuable reference monitor.
- Nationwide Reach: No matter where you are in the United States, I can restore your monitor to factory specifications.
- Studio References: I've worked with major Hollywood studios, post houses, and color grading suites nationwide.
- Direct Contact: Email me at jt@tekmg.com for a quick quote or consultation.
Frequently Asked Questions – Sony BVM-HX300
❓ What makes the BVM-HX300 special?
The BVM-HX300 features Sony's proprietary dual-layer LCD technology, delivering 1,000,000:1 contrast ratio, 1000 nits peak brightness, and exceptional color accuracy. It's the standard for HDR grading.
❓ How long does a full restoration take at your shop?
Typically 3-4 weeks depending on parts availability and HDR calibration requirements. Rush service available.
❓ Do you really offer nationwide service?
Yes! I serve customers across all 50 states. I provide detailed shipping instructions for safe transport of your BVM-HX300.
❓ Can you calibrate for HDR (PQ and HLG)?
Yes – I specialize in HDR calibration for PQ (ST.2084) and HLG transfer functions using professional-grade colorimeters and software.
❓ Do you have spare parts for the BVM-HX300?
Yes, I've accumulated a stock of power supply components, capacitors, driver ICs, and input boards for this model.
❓ Do you warranty your work?
Yes, 90-day warranty on all parts and labor. I stand behind every restoration.
❓ How can I contact you directly?
Call me at (818) 244-4440 or email jt@tekmg.com. I respond to emails within a few hours during business days.
❓ Do you offer local pickup and delivery in Los Angeles?
Yes, for clients in Los Angeles County, Orange County, Ventura County, Riverside County, and San Bernardino County.
My Service Area – Local & Nationwide
🇺🇸 NATIONWIDE SERVICE AVAILABLE 🇺🇸
Ship your Sony BVM-HX300 securely to my Los Angeles facility – I serve customers across all 50 states
Local Service: Los Angeles County, Orange County, Ventura County, Riverside County, San Bernardino County, and surrounding Southern California areas.
Nationwide Service: For customers outside Southern California, I offer secure shipping options. I'll provide detailed packing instructions for your reference monitor and work with fully insured carriers.
Contact Me: For questions or to schedule service, call (818) 244-4440 or email jt@tekmg.com.
Los Angeles County: LA Burbank Glendale Santa Monica Hollywood Pasadena Beverly Hills
Orange County: Santa Ana Anaheim Irvine Costa Mesa Newport Beach
Nationwide Shipping: New York Texas Florida Illinois Colorado Washington Georgia All 50 States
TEK Media Group — Professional 4K HDR Reference Monitor Restoration Since 1994
📞 (818) 244-4440 | ✉️ jt@tekmg.com
Serving Los Angeles, Orange County, Ventura, Riverside, San Bernardino, and nationwide via secure shipping
Specializing in Sony BVM/PVM, FSI, Eizo, and Professional 4K HDR Reference Monitors
Sony BVM-HX300 Specialist • 4K HDR Calibration • Dual-Layer LCD Restoration • 30+ Years Experience
Every BVM monitor gets my personal attention – I'm the technician who does the work. Nationwide service available. Email me directly at jt@tekmg.com.
